Can I connect my phone to my computer thru the USB and send a fax.?

No. You need a fax at both ends, or a fax emulator at your end at least, to make it work. Just having a phone connection is not enough. When the called fax answers, it will begin to send tones back to the "fax" machine that called it to negotiate how everything is going to work (called handshake) and if your end can't speak fax, the called fax will just hang up when it gets no response.